PARDO , M.

The Chilean Andes extend north–south for about 3000 km over the subducting Nazca plate, and show evidence of local rheological controls on first-order tectonic features. Here, rheological parameters are tested with numerical models of a subduction driven by slab-pull and upper plate velocities, and which calculate the development of stress and...

Journal of South American Earth Sciences, v. 15, n. 1, p. 11-22, 2002. http://dx.doi.org/10.1016/S0895-9811(02)00003-2

Tectonophysics, v. 345, n. 1-4, p. 199-210, 2002. http://dx.doi.org/10.1016/S0040-1951(01)00213-X

The region of central Chile offers a unique opportunity to study the links between the subducting Juan Fernandez Ridge, the flat slab, the double seismic zone (DSZ), and the absence of modern volcanism. Here we report the presence and characteristics of the first observed DSZ within the intermediate-depth Nazca slab using two temporary seismic...

An intermediate-depth earthquake (7 January 2003, Mw 5.7) occurred within the subducting Nazca plate at longitude 70.3°W, latitude 33.8°S and depth 113 km. Its focal mechanism shows normal faulting with a slight strike-slip component. We detected 50 aftershocks within January 2003 using a temporary seismic network installed in the zone. Their...

Our study compares the seismic properties between the flat and normal subduction regions in central Chile, to better understand the links between the slab geometry, surface deformation and the deeper structures. In comparison with previous studies, we show the most complete 3-D regional seismic tomography images for this region, in which we use...

Bulletin of the Seismological Society of America, v. 99, p. 87-94, 2009. http://dx.doi.org/10.1785/0120080192